docs: def _add_cloud_distro_check(cloud_archive_release, openstack_release):
      """Add the cloud pocket, but also check the cloud_archive_release against
      the current distro, and use the openstack_release as the full lookup.
  
      This just calls _add_cloud_pocket() with the openstack_release as pocket
      to get the correct cloud-archive.list for dpkg to work with.
  
      :param cloud_archive_release:String, codename for the distro release.
      :param openstack_release: String, spec for the release to look up in the
          CLOUD_ARCHIVE_POCKETS
      :raises: SourceConfigError if this is the wrong distro, or the pocket spec
          doesn't exist.
      """
      _verify_is_ubuntu_rel(cloud_archive_release, openstack_release)
      _add_cloud_pocket("{}-{}".format(cloud_archive_release, openstack_release))